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How to use UnstackEngine method of NBi.Core.ResultSet.Alteration.Reshaping.UnstackEngine class

Best NBi code snippet using NBi.Core.ResultSet.Alteration.Reshaping.UnstackEngine.UnstackEngine

UnstackEngineTest.cs

Source:UnstackEngineTest.cs

...12using System.Data;13using System.Diagnostics;14namespace NBi.Testing.Core.ResultSet.Alteration.Reshaping15{16    public class UnstackEngineTest17    {18        [Test]19        public void Execute_SingleKeySingleValue_ExpectedResultSet()20        {21            var resolver = new ObjectsResultSetResolver(22                new ObjectsResultSetResolverArgs(23                    new[] {24                        new object[] { "alpha", "A", 1 },25                        new object[] { "alpha", "B", 2 },26                        new object[] { "beta", "A", 3 },27                        new object[] { "beta", "B", 4 }28                    }29                ));30            var rs = resolver.Execute();31            rs.Columns[0].ColumnName = "keyColumn";32            rs.Columns[1].ColumnName = "headerColumn";33            rs.Columns[2].ColumnName = "valueColumn";34            var args = new UnstackArgs(35                    new ColumnNameIdentifier("headerColumn"),36                    new List<IColumnDefinitionLight>()37                    { Mock.Of<IColumnDefinitionLight>(x => x.Identifier == new ColumnNameIdentifier("keyColumn") && x.Type == ColumnType.Text) }38                );39            var unstack = new UnstackEngine(args);40            var result = unstack.Execute(rs);41            Assert.That(result, Is.Not.Null);42            Assert.That(result.Columns.Count, Is.EqualTo(3));43            Assert.That(result.Columns.Cast<DataColumn>().Any(x => x.ColumnName == "keyColumn"));44            Assert.That(result.Columns.Cast<DataColumn>().Any(x => x.ColumnName == "A"));45            Assert.That(result.Columns.Cast<DataColumn>().Any(x => x.ColumnName == "B"));46            Assert.That(result.Rows.Count, Is.EqualTo(2));47            Assert.That(Convert.ToInt32(result.Rows.Cast<DataRow>().Single(x => x["keyColumn"] as string == "alpha")["A"]) == 1);48            Assert.That(Convert.ToInt32(result.Rows.Cast<DataRow>().Single(x => x["keyColumn"] as string == "alpha")["B"]) == 2);49            Assert.That(Convert.ToInt32(result.Rows.Cast<DataRow>().Single(x => x["keyColumn"] as string == "beta")["A"]) == 3);50            Assert.That(Convert.ToInt32(result.Rows.Cast<DataRow>().Single(x => x["keyColumn"] as string == "beta")["B"]) == 4);51        }52        [Test]53        public void Execute_SingleKeyMultipleValue_ExpectedResultSet()54        {55            var resolver = new ObjectsResultSetResolver(56                new ObjectsResultSetResolverArgs(57                    new[] {58                        new object[] { "alpha", "A", 1, -1 },59                        new object[] { "alpha", "B", 2, -2 },60                        new object[] { "beta", "A", 3, -3 },61                        new object[] { "beta", "B", 4, -4 }62                    }63                ));64            var rs = resolver.Execute();65            rs.Columns[0].ColumnName = "keyColumn";66            rs.Columns[1].ColumnName = "headerColumn";67            rs.Columns[2].ColumnName = "value1Column";68            rs.Columns[3].ColumnName = "value2Column";69            var args = new UnstackArgs(70                    new ColumnNameIdentifier("headerColumn"),71                    new List<IColumnDefinitionLight>()72                    { Mock.Of<IColumnDefinitionLight>(x => x.Identifier == new ColumnNameIdentifier("keyColumn") && x.Type == ColumnType.Text) }73                );74            var unstack = new UnstackEngine(args);75            var result = unstack.Execute(rs);76            Assert.That(result, Is.Not.Null);77            Assert.That(result.Columns.Count, Is.EqualTo(5));78            Assert.That(result.Columns.Cast<DataColumn>().Any(x => x.ColumnName == "keyColumn"));79            Assert.That(result.Columns.Cast<DataColumn>().Any(x => x.ColumnName == "A_value1Column"));80            Assert.That(result.Columns.Cast<DataColumn>().Any(x => x.ColumnName == "B_value1Column"));81            Assert.That(result.Columns.Cast<DataColumn>().Any(x => x.ColumnName == "A_value2Column"));82            Assert.That(result.Columns.Cast<DataColumn>().Any(x => x.ColumnName == "B_value2Column"));83            Assert.That(result.Rows.Count, Is.EqualTo(2));84            Assert.That(Convert.ToInt32(result.Rows.Cast<DataRow>().Single(x => x["keyColumn"] as string == "alpha")["A_value1Column"]) == 1);85            Assert.That(Convert.ToInt32(result.Rows.Cast<DataRow>().Single(x => x["keyColumn"] as string == "alpha")["B_value1Column"]) == 2);86            Assert.That(Convert.ToInt32(result.Rows.Cast<DataRow>().Single(x => x["keyColumn"] as string == "beta")["A_value1Column"]) == 3);87            Assert.That(Convert.ToInt32(result.Rows.Cast<DataRow>().Single(x => x["keyColumn"] as string == "beta")["B_value1Column"]) == 4);88            Assert.That(Convert.ToInt32(result.Rows.Cast<DataRow>().Single(x => x["keyColumn"] as string == "alpha")["A_value2Column"]) == -1);89            Assert.That(Convert.ToInt32(result.Rows.Cast<DataRow>().Single(x => x["keyColumn"] as string == "alpha")["B_value2Column"]) == -2);90            Assert.That(Convert.ToInt32(result.Rows.Cast<DataRow>().Single(x => x["keyColumn"] as string == "beta")["A_value2Column"]) == -3);91            Assert.That(Convert.ToInt32(result.Rows.Cast<DataRow>().Single(x => x["keyColumn"] as string == "beta")["B_value2Column"]) == -4);92        }93        [Test]94        public void Execute_MultipleKeysSingleValue_ExpectedResultSet()95        {96            var resolver = new ObjectsResultSetResolver(97                new ObjectsResultSetResolverArgs(98                    new[] {99                        new object[] { "alpha", "one", "A", 1 },100                        new object[] { "alpha", "one", "B", 2 },101                        new object[] { "beta", "one", "A", 3 },102                        new object[] { "beta", "one", "B", 4 },103                        new object[] { "beta", "two", "B", -4 }104                    }105                ));106            var rs = resolver.Execute();107            rs.Columns[0].ColumnName = "key1Column";108            rs.Columns[1].ColumnName = "key2Column";109            rs.Columns[2].ColumnName = "headerColumn";110            rs.Columns[3].ColumnName = "valueColumn";111            var args = new UnstackArgs(112                    new ColumnNameIdentifier("headerColumn"),113                    new List<IColumnDefinitionLight>()114                    {115                        Mock.Of<IColumnDefinitionLight>(x => x.Identifier == new ColumnNameIdentifier("key1Column") && x.Type == ColumnType.Text),116                        Mock.Of<IColumnDefinitionLight>(x => x.Identifier == new ColumnNameIdentifier("key2Column") && x.Type == ColumnType.Text),117                    }118                );119            var unstack = new UnstackEngine(args);120            var result = unstack.Execute(rs);121            Assert.That(result, Is.Not.Null);122            Assert.That(result.Columns.Count, Is.EqualTo(4));123            Assert.That(result.Columns.Cast<DataColumn>().Any(x => x.ColumnName == "key1Column"));124            Assert.That(result.Columns.Cast<DataColumn>().Any(x => x.ColumnName == "key2Column"));125            Assert.That(result.Columns.Cast<DataColumn>().Any(x => x.ColumnName == "A"));126            Assert.That(result.Columns.Cast<DataColumn>().Any(x => x.ColumnName == "B"));127            Assert.That(result.Rows.Count, Is.EqualTo(3));128            Assert.That(Convert.ToInt32(result.Rows.Cast<DataRow>().Single(x => x["key1Column"] as string == "alpha" && x["key2Column"] as string == "one")["A"]) == 1);129            Assert.That(Convert.ToInt32(result.Rows.Cast<DataRow>().Single(x => x["key1Column"] as string == "alpha" && x["key2Column"] as string == "one")["B"]) == 2);130            Assert.That(Convert.ToInt32(result.Rows.Cast<DataRow>().Single(x => x["key1Column"] as string == "beta" && x["key2Column"] as string == "one")["A"]) == 3);131            Assert.That(Convert.ToInt32(result.Rows.Cast<DataRow>().Single(x => x["key1Column"] as string == "beta" && x["key2Column"] as string == "one")["B"]) == 4);132            Assert.That(Convert.ToInt32(result.Rows.Cast<DataRow>().Single(x => x["key1Column"] as string == "beta" && x["key2Column"] as string == "two")["B"]) == -4);133            Assert.That(result.Rows.Cast<DataRow>().Single(x => x["key1Column"] as string == "beta" && x["key2Column"] as string == "two")["A"] == DBNull.Value);134        }135        [Test]136        public void Execute_EnforcedColumnsThatWasNotExpected_ExpectedResultSet()137        {138            var resolver = new ObjectsResultSetResolver(139                new ObjectsResultSetResolverArgs(140                    new[] {141                        new object[] { "alpha", "A", 1 },142                        new object[] { "alpha", "B", 2 },143                        new object[] { "beta", "A", 3 },144                        new object[] { "beta", "B", 4 }145                    }146                ));147            var rs = resolver.Execute();148            rs.Columns[0].ColumnName = "keyColumn";149            rs.Columns[1].ColumnName = "headerColumn";150            rs.Columns[2].ColumnName = "valueColumn";151            var args = new UnstackArgs(152                    new ColumnNameIdentifier("headerColumn"),153                    new List<IColumnDefinitionLight>()154                    { Mock.Of<IColumnDefinitionLight>(x => x.Identifier == new ColumnNameIdentifier("keyColumn") && x.Type == ColumnType.Text) },155                    new List<ColumnNameIdentifier>() {  new ColumnNameIdentifier("C") }156                );157            var unstack = new UnstackEngine(args);158            var result = unstack.Execute(rs);159            Assert.That(result, Is.Not.Null);160            Assert.That(result.Columns.Count, Is.EqualTo(4));161            Assert.That(result.Columns.Cast<DataColumn>().Any(x => x.ColumnName == "keyColumn"));162            Assert.That(result.Columns.Cast<DataColumn>().Any(x => x.ColumnName == "A"));163            Assert.That(result.Columns.Cast<DataColumn>().Any(x => x.ColumnName == "B"));164            Assert.That(result.Columns.Cast<DataColumn>().Any(x => x.ColumnName == "C"));165            Assert.That(result.Rows.Count, Is.EqualTo(2));166            Assert.That(result.Rows.Cast<DataRow>().Single(x => x["keyColumn"] as string == "alpha")["C"] == DBNull.Value);167            Assert.That(result.Rows.Cast<DataRow>().Single(x => x["keyColumn"] as string == "alpha")["C"] == DBNull.Value);168        }169        [Test]170        public void Execute_EnforcedColumnsThatWasAlreadyExpected_ExpectedResultSet()171        {172            var resolver = new ObjectsResultSetResolver(173                new ObjectsResultSetResolverArgs(174                    new[] {175                        new object[] { "alpha", "A", 1 },176                        new object[] { "alpha", "B", 2 },177                        new object[] { "beta", "A", 3 },178                        new object[] { "beta", "B", 4 }179                    }180                ));181            var rs = resolver.Execute();182            rs.Columns[0].ColumnName = "keyColumn";183            rs.Columns[1].ColumnName = "headerColumn";184            rs.Columns[2].ColumnName = "valueColumn";185            var args = new UnstackArgs(186                    new ColumnNameIdentifier("headerColumn"),187                    new List<IColumnDefinitionLight>()188                    { Mock.Of<IColumnDefinitionLight>(x => x.Identifier == new ColumnNameIdentifier("keyColumn") && x.Type == ColumnType.Text) },189                    new List<ColumnNameIdentifier>() { new ColumnNameIdentifier("A"), new ColumnNameIdentifier("B") }190                );191            var unstack = new UnstackEngine(args);192            var result = unstack.Execute(rs);193            Assert.That(result, Is.Not.Null);194            Assert.That(result.Columns.Count, Is.EqualTo(3));195            Assert.That(result.Columns.Cast<DataColumn>().Any(x => x.ColumnName == "keyColumn"));196            Assert.That(result.Columns.Cast<DataColumn>().Any(x => x.ColumnName == "A"));197            Assert.That(result.Columns.Cast<DataColumn>().Any(x => x.ColumnName == "B"));198            Assert.That(result.Columns.Cast<DataColumn>().Count(x => x.ColumnName == "A") == 1);199            Assert.That(result.Columns.Cast<DataColumn>().Count(x => x.ColumnName == "B") == 1);200        }201        [Test]202        [TestCase(100)]203        [TestCase(1000)]204        [TestCase(10000)]205        [TestCase(40000)]206        [Retry(3)]207        [Parallelizable(ParallelScope.Self)]208        public void Execute_LargeResultSet_ExpectedPerformance(int count)209        {210            var values = new List<object>();211            for (int i = 0; i < count; i++)212                values.Add(new object[] { i % 2 == 0 ? "alpha" : "beta", (i/2) % (count/2), 1 });213            var resolver = new ObjectsResultSetResolver(new ObjectsResultSetResolverArgs(values));214            var rs = resolver.Execute();215            rs.Columns[0].ColumnName = "keyColumn";216            rs.Columns[1].ColumnName = "headerColumn";217            rs.Columns[2].ColumnName = "valueColumn";218            var args = new UnstackArgs(219                    new ColumnNameIdentifier("headerColumn"),220                    new List<IColumnDefinitionLight>()221                    { Mock.Of<IColumnDefinitionLight>(x => x.Identifier == new ColumnNameIdentifier("keyColumn") && x.Type == ColumnType.Text) }222                );223            var unstack = new UnstackEngine(args);224            var stopWatch = new Stopwatch();225            stopWatch.Start();226            var result = unstack.Execute(rs);227            stopWatch.Stop();228            Assert.That(stopWatch.Elapsed.TotalSeconds, Is.LessThan(15));229        }230    }231}...

UnstackEngine.cs

Source:UnstackEngine.cs

...9using System.Text;10using System.Threading.Tasks;11namespace NBi.Core.ResultSet.Alteration.Reshaping12{13    class UnstackEngine : IReshapingEngine14    {15        private UnstackArgs Args { get; }16        public UnstackEngine(UnstackArgs args)17            => Args = args;18        public IResultSet Execute(IResultSet rs)19        {20            //Build structre of the resulting table21            var valueColumns = rs.Columns.Cast<DataColumn>().Where(22                    x => x != Args.Header.GetColumn(rs.Table)23                    && !Args.GroupBys.Select(y => y.Identifier.GetColumn(rs.Table)).Contains(x)24                );25            26            var headerValues = Args.EnforcedColumns.Select(x => x.Name).ToList();27            rs.Rows.Cast<DataRow>().ToList().ForEach(x => headerValues.Add(Args.Header.GetValue(x).ToString()));28            headerValues = headerValues.Distinct().ToList();29            using (var dataTable = new DataTable())30            {...

ReshapingFactory.cs

Source:ReshapingFactory.cs

...10        public IReshapingEngine Instantiate(IReshapingArgs args)11        {12            switch(args)13            {14                case UnstackArgs x: return new UnstackEngine(x);15                default: throw new ArgumentException();16            }17        }18    }19}...

UnstackEngine

Using AI Code Generation

1using System;2using System.Collections.Generic;3using System.Linq;4using System.Text;5using System.Threading.Tasks;6using NBi.Core.ResultSet;7using NBi.Core.ResultSet.Alteration.Reshaping;8{9    {10        static void Main(string[] args)11        {12            ResultSet resultSet = new ResultSet();13            resultSet.Columns.Add(new Column("Column1"));14            resultSet.Columns.Add(new Column("Column2"));15            resultSet.Columns.Add(new Column("Column3"));16            resultSet.Columns.Add(new Column("Column4"));17            resultSet.Columns.Add(new Column("Column5"));18            resultSet.Rows.Add(new Row(new List<object>() { "A", "B", "C", "D", "E" }));19            resultSet.Rows.Add(new Row(new List<object>() { "F", "G", "H", "I", "J" }));20            resultSet.Rows.Add(new Row(new List<object>() { "K", "L", "M", "N", "O" }));21            UnstackEngine unstackEngine = new UnstackEngine("Column1", "Column2", "Column3");22            unstackEngine.Execute(resultSet);23            foreach (var row in resultSet.Rows)24            {25                foreach (var item in row)26                {27                    Console.Write(item + " ");28                }29                Console.WriteLine();30            }31            Console.ReadLine();32        }33    }34}35using System;36using System.Collections.Generic;37using System.Linq;38using System.Text;39using System.Threading.Tasks;40using NBi.Core.ResultSet;41using NBi.Core.ResultSet.Alteration.Reshaping;42{43    {44        static void Main(string[] args)45        {46            ResultSet resultSet = new ResultSet();47            resultSet.Columns.Add(new Column("Column1"));48            resultSet.Columns.Add(new Column("Column2"));49            resultSet.Columns.Add(new Column("Column3"));50            resultSet.Columns.Add(new Column("Column4"));51            resultSet.Columns.Add(new Column("Column5"));52            resultSet.Rows.Add(new Row(new List<object>() { "A", "B", "C",

UnstackEngine

Using AI Code Generation

1using System;2using System.Collections.Generic;3using System.Data;4using System.Linq;5using System.Text;6using System.Threading.Tasks;7using NBi.Core.ResultSet.Alteration.Reshaping;8using NBi.Core.ResultSet;9using NBi.Core.ResultSet.Resolver;10{11    {12        public ResultSetResultSetAlterationArgs Args { get; }13        public UnstackEngine(ResultSetResultSetAlterationArgs args)14            => Args = args;15        public void Execute(DataTable table)16        {17            var unstacker = new Unstacker(table, Args.ColumnNames, Args.NewColumnName);18            unstacker.Unstack();19        }20    }21}22using System;23using System.Collections.Generic;24using System.Data;25using System.Linq;26using System.Text;27using System.Threading.Tasks;28using NBi.Core.ResultSet.Alteration.Reshaping;29using NBi.Core.ResultSet;30{31    {32        private DataTable Table { get; }33        private string[] ColumnNames { get; }34        private string NewColumnName { get; }35        private string[] NewColumnNames { get; }36        private List<string> ColumnNamesList { get; }37        public Unstacker(DataTable table, string[] columnNames, string newColumnName)38        {39            Table = table;40            ColumnNames = columnNames;41            NewColumnName = newColumnName;42            NewColumnNames = newColumnName.Split('|').ToArray();43            ColumnNamesList = new List<string>();44        }45        public void Unstack()46        {47            if (NewColumnNames.Length != ColumnNames.Length)48                throw new ArgumentException("The number of column names in the new column name argument must match the number of column names in the column names argument.");49            foreach (var column in ColumnNames)50            {51                if (!Table.Columns.Contains(column))52                    throw new ArgumentException($"The column name {column} does not exist in the table.");53            }54            foreach (var column in NewColumnNames)55            {56                if (Table.Columns.Contains(column))57                    throw new ArgumentException($"The column name {column} already exists in the table.");58            }59            for (var i = 0; i < ColumnNames.Length; i

UnstackEngine

Using AI Code Generation

1using System;2using System.Data;3using System.Collections.Generic;4using System.Linq;5using System.Text;6using System.Threading.Tasks;7using NBi.Core.ResultSet.Alteration.Reshaping;8{9    {10        public UnstackEngine(DataTable table, string[] columns, string[] values)11        {12        }13        public DataTable Execute()14        {15            return new DataTable();16        }17    }18}19using System;20using System.Data;21using System.Collections.Generic;22using System.Linq;23using System.Text;24using System.Threading.Tasks;25using NBi.Core.ResultSet.Alteration.Reshaping;26{27    {28        public UnstackEngine(DataTable table, string[] columns, string[] values)29        {30        }31        public DataTable Execute()32        {33            return new DataTable();34        }35    }36}

UnstackEngine

Using AI Code Generation

1using System;2using System.Collections.Generic;3using System.Linq;4using System.Text;5using System.Data;6using NBi.Core.ResultSet.Alteration.Reshaping;7using System.Collections;8{9    {10        static void Main(string[] args)11        {12            DataTable dt = new DataTable();13            dt.Columns.Add("key", typeof(string));14            dt.Columns.Add("value", typeof(string));15            dt.Columns.Add("measure", typeof(string));16            dt.Rows.Add("A", "1", "Measure1");17            dt.Rows.Add("A", "2", "Measure2");18            dt.Rows.Add("A", "3", "Measure3");19            dt.Rows.Add("B", "4", "Measure1");20            dt.Rows.Add("B", "5", "Measure2");21            dt.Rows.Add("B", "6", "Measure3");22            dt.Rows.Add("C", "7", "Measure1");23            dt.Rows.Add("C", "8", "Measure2");24            dt.Rows.Add("C", "9", "Measure3");25            dt.Rows.Add("D", "10", "Measure1");26            dt.Rows.Add("D", "11", "Measure2");27            dt.Rows.Add("D", "12", "Measure3");28            dt.Rows.Add("E", "13", "Measure1");29            dt.Rows.Add("E", "14", "Measure2");30            dt.Rows.Add("E", "15", "Measure3");31            UnstackEngine unstackEngine = new UnstackEngine("key", "measure", "value");32            var result = unstackEngine.Execute(dt);33            Console.WriteLine(result.Rows.Count);34            Console.WriteLine(result.Columns.Count);35            Console.WriteLine(result.Rows[0][0].ToString());36            Console.WriteLine(result.Rows[0][1].ToString());37            Console.WriteLine(result.Rows[0][2].ToString());38            Console.WriteLine(result.Rows[0][3].ToString());39            Console.WriteLine(result.Rows[0][4].ToString());40            Console.WriteLine(result.Rows[0][5].ToString());41            Console.WriteLine(result.Rows[1][0].ToString());42            Console.WriteLine(result.Rows[1][1].ToString());43            Console.WriteLine(result.Rows[1][2].ToString());44            Console.WriteLine(result.Rows[1][3].ToString());45            Console.WriteLine(result.Rows[1][4].ToString());46            Console.WriteLine(result.Rows[1][5].ToString());47            Console.WriteLine(result.Rows

UnstackEngine

Using AI Code Generation

1using System;2using System.Data;3using NBi.Core.ResultSet.Alteration.Reshaping;4using NBi.Core.ResultSet;5{6    {7        static void Main(string[] args)8        {9            DataTable dt = new DataTable();10            dt.Columns.Add("id");11            dt.Columns.Add("measure");12            dt.Columns.Add("value");13            dt.Rows.Add(1, "a", 1);14            dt.Rows.Add(1, "b", 2);15            dt.Rows.Add(1, "c", 3);16            dt.Rows.Add(2, "a", 4);17            dt.Rows.Add(2, "b", 5);18            dt.Rows.Add(2, "c", 6);19            var unstack = new UnstackEngine("measure", "value");20            var result = unstack.Execute(dt);21            foreach (DataRow row in result.Rows)22            {23                Console.WriteLine(row["id"] + " " + row["a"] + " " + row["b"] + " " + row["c"]);24            }25        }26    }27}

UnstackEngine

Using AI Code Generation

1using (var engine = new UnstackEngine())2{3    var result = engine.Unstack(4        new ResultSet()5        {6            Columns = new[] { "Name", "Value" },7            Rows = new[] {8                new[] { "A", "B", "C" },9                new[] { "1", "2", "3" },10                new[] { "4", "5", "6" },11            }12        },13        new[] { "Name" },14    );15}16using (var engine = new UnstackEngine())17{18    var result = engine.Unstack(19        new ResultSet()20        {21            Columns = new[] { "Name", "Value" },22            Rows = new[] {23                new[] { "A", "B", "C" },24                new[] { "1", "2", "3" },25                new[] { "4", "5", "6" },26            }27        },28        new[] { "Name" },29    );30}31using (var engine = new UnstackEngine())32{33    var result = engine.Unstack(34        new ResultSet()35        {36            Columns = new[] { "Name", "Value" },37            Rows = new[] {38                new[] { "A", "B", "C" },39                new[] { "1", "2", "3" },40                new[] { "4", "5", "6" },41            }42        },43        new[] { "Name" },44    );45}46using (var engine = new UnstackEngine())47{48    var result = engine.Unstack(49        new ResultSet()50        {51            Columns = new[] { "Name", "Value" },52            Rows = new[] {53                new[] { "A", "B", "C" },54                new[] { "1", "2", "3" },55                new[] { "4", "5", "6" },56            }57        },

UnstackEngine

Using AI Code Generation

1using NBi.Core.ResultSet;2using NBi.Core.ResultSet.Alteration.Reshaping;3using NBi.Core.Calculation;4using System.Data;5using System;6using System.Collections.Generic;7using System.Linq;8using System.Text;9using System.Threading.Tasks;10{11    {12        static void Main(string[] args)13        {14            DataTable dt = new DataTable();15            dt.Columns.Add("Key", typeof(string));16            dt.Columns.Add("Value", typeof(string));17            dt.Rows.Add("A", "1");18            dt.Rows.Add("A", "2");19            dt.Rows.Add("B", "3");20            UnstackEngine unstackEngine = new UnstackEngine();

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